<p>简单地实现<code> Cloneable </code> 也应该实现<code> Object.clone（）</code>方法.</p>

<h2>不规范代码示例</h2>
<pre>
class Team implements Cloneable {  // 不合规
  private Person coach;
  private List&lt;Person&gt; players;
  public void addPlayer(Person p) {...}
  public Person getCoach() {...}
}
</pre>

<h2>正确代码示例</h2>
<pre>
class Team implements Cloneable {
  private Person coach;
  private List&lt;Person&gt; players;
  public void addPlayer(Person p) { ... }
  public Person getCoach() { ... }

  @Override
  public Object clone() { 
    Team clone = (Team) super.clone();
    //...
  }
}
</pre>
